**Motivation**
Currently, pointers of the revision slider can be positioned anywhere. If they are put behind the other pointer, their change color and flip, so that the left pointer always indicates the left revision and the right pointer always indicates the right revision. In user tests, this has turned out to be confusing.
**Task**
Change the look of the pointers as follows:
{F6564247}
**Spec**
- Revisions are changed by moving pointers (round in the mock) on sliders (blue/lines)
-- Pointers can be moved by Drag and Drop
-- Pointers can be moved by clicking on the slider
-- Pointers cannot be moved further than where the other pointer is. This means that the yellow slider does not extend to- or beyond the blue pointer to the right, and that the blue slider does not extend to- or beyond the yellow pointer on the left. This means yellow and blue pointers cant be switched, the blue pointer is always the most right, the yellow always the most left one.